What Are the Reasons for Engine Shaking After Cold Start?

[VanFrank]

The reasons for engine shaking after cold start are: 1. Mechanical failure of the engine, uneven cylinder pressure in each cylinder; 2. Intake pipe leakage, excessive carbon buildup on intake valves and intake pipes, or excessive dirt on throttle valves and intake pipe walls; 3. Abnormal water temperature or intake temperature signals, or wiring faults; 4. Excessive carbon buildup on spark plugs or damaged ignition coils; 5. Leakage in high-voltage wires or distributor caps; 6. Excessive internal carbon deposits in fuel injectors causing improper sealing or blockage. The solutions for cold start shaking are: 1. Check for engine faults or clean engine carbon deposits; 2. Inspect the working condition of spark plugs and ignition coils; 3. Check for any wiring issues.